Here's why:
* Feet: The plural of "foot" is "feet".
* Sheep: "Sheep" is a word that has the same form for both singular and plural.
* Hooves: The plural of "hoof" is "hooves".
* Injuries: The plural of "injury" is "injuries".
Here's why:
* Feet: The plural of "foot" is "feet".
* Sheep: "Sheep" is a word that has the same form for both singular and plural.
* Hooves: The plural of "hoof" is "hooves".
* Injuries: The plural of "injury" is "injuries".